ESP32 Forum

Posted: **Tue Apr 08, 2025 6:52 am**

Hi,

I successfully downloaded a new firmware image via OTA. However, on bootup of the new image, I see this message:

--- Warning: Checksum mismatch between flashed and built applications. Checksum of built application is fb7f174914f5b96ccf1fcddd773e80d3451e2d03e1931a69ba0215fa206cf965

Is this a problem?

Posted: **Tue Apr 08, 2025 9:19 pm**

Not a problem. That is just the IDF monitor letting you know that the checksum of the firmware running on your ESP32 doesn't match the checksum of the built firmware on the machine that you're running IDF monitor from. See here. The message isn't coming from your ESP device, but rather IDF monitor.

Posted: **Tue Apr 08, 2025 9:40 pm**

Thanks!

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